Gino Roberto Corazza1, Marco Vincenzo Lenti2. 1. First Department of Internal Medicine, Fondazione IRCCS Policlinico San Matteo, Clinica Medica, University of Pavia, Piazzale Golgi 19, 27100, Pavia, Italy. gr.corazza@smatteo.pv.it. 2. First Department of Internal Medicine, Fondazione IRCCS Policlinico San Matteo, Clinica Medica, University of Pavia, Piazzale Golgi 19, 27100, Pavia, Italy.